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Introduction to SQL

Introduction to SQL
Which of the following do you need to consider when you make a table in SQL?

All of these
Default values
Data types
Primary keys

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Introduction to SQL
Which command undo all the updates performed by the SQL in the transaction?

TRUNCATE
DELETE
COMMIT
ROLLBACK

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Introduction to SQL
Find all the cities whose humidity is 89

SELECT city FROM weather;
SELECT city FROM weather WHERE humidity = 89;
SELECT city WHERE humidity = 89;
SELECT humidity = 89 FROM weather;

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Introduction to SQL
............. joins two or more tables based on a specified column value not equaling a specified column value in another table.

EQUIJOIN
NATURAL JOIN
NON-EQUIJOIN
OUTER JOIN

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Introduction to SQL
The SQL keyword BETWEEN is used:

as a wildcard.
to limit the columns displayed.
for ranges.
None of these

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Introduction to SQL
The SQL statement: SELECT Number1 + Number 2 AS Total FROM NUMBER_TABLE; adds two numbers from each row together and lists the results in a column named Total.

False
True

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